I'm sure if they don't take customer support seriously, they will pay a price for it in the long run.
Would just like to clarify, that I don't think expecting personal support for non-paid services is reasonable. But as a paid customer (for e.g. of Uber), one should at least be able to call an IVR. But these cos. deliberately make it harder for you to get their numbers.
[1]for e.g. how youtube was free speech and niche artists, how google would get you to the result the quickest
10% of 1B is 100M.
100M tickets in how much time? Let's say a year. And it takes on average 5 minutes to respond to 1. That is 500M minutes. So you need a team of ~1500 people to respond to 100M tickets in a year. Not that bad eh.
Separately, your time estimates are much too low.
True that 5 mins per ticket is too less. But I don't think any paid tech service has 1B customers. (users yes, customers, I don't think so).
You could say it's one of the negative side effects of globalization - instead of small market entities serving their local populations, you have large market entities that try to handle everyone themselves.
They have a billion customers and still have a simple phone number, a mobile app and physical counters for customer service.